The ipsec-tools package is used in conjunction with the IPsec functionalityin the linux kernel and includes racoon, an IKEv1 keying daemon.

A denial of service flaw was found in the ipsec-tools racoon daemon. It waspossible for a remote attacker, with knowledge of an existing ipsec tunnel,to terminate the ipsec connection between two machines. (CVE-2007-1841)

Users of ipsec-tools should upgrade to these updated packages, whichcontain a backported patch that resolves this issue.

4. Solution:

Before applying this update, make sure that all previously-releasederrata relevant to your system have been applied.

This update is available via Red Hat Network. Details on how to use the Red Hat Network to apply this update are available athttp://kbase.redhat.com/faq/FAQ_58_10188